Compression-sleeve seal



Jan. 12 1926. v

' J. B.'KEAT|NG couPnEssIoN SLEEVE slm.4

Eiled oct. 5. 1922 INVENTOR. f/o/fz /ftd/hy BY y ATTORNEY lll Patentedl2, 1926.

UNITED STATES PATENT OFFICE.

JOHN B. KEATING, OF PIEDMONT, CALIFORNIA. ASSIGNOR TO BYRON JACKSON PUMPMFG. CO., OF BERKELEY, CALIFORNIA, A CORPORATION OF CALIFORNIA.

COMPRESSION-SLEEVE SEAL.

Application led October 5, 1922.

revolving impeller, and a constant back pressure due to the head orcolumn of water pumped. rIhis is especially true in deepwell turbinepumps, in which there is a high static pressure to overcome. Resultingfrom these causes there is a constant leakage of water at the region ofthe impellers, through the shaft bearings and along 'the shaft back tothe impellers of the pump, which water must again be forced onward bythe impellers. Hence, there follows an appreciable reduced efficiency ofthe pump.

Thel main objects of my invention are to prevent the above leakage andto increase the eliiciency of the pump.

I attain these objects by positioning between the metallic bearing ofthe shaft and the impeller, a sleeve of rubber, or other sott,conformingmaterial, which will effectualhY seal the parts against the abovedescribed leakage.

In the accompanying sheet of drawings, I have shown part of a deep-wellturbine centrifugal pump, with my invention applied thereto, thus fullyillustrating the invention.

Figure l is a vertical section of the above part, showing two impellers,casing members therefor, and drive shaft. and my sealing sleeves inplace.

Figure 2 is a similar section on a larger scaley showing only the pumpshaft, a sealing sleeve, and the contiguous parts of the pump casing.

Serial No. 592,547.

Figure 3 is a cross-section at the line ifi- A ot' Figure 2 and showsmore especially the means for preventing rotation of the sealing sleeve.

Referring to the drawings: 'lhe shaft l drives the inipellers 2, housedin their respective casings, and of which 3 is the outer column wall and4 the inner column wall. rlfhe sealing-sleeve 5 is supported in a recessand is compressively maintained therein by the bottom plate 6. Thesleeve 5 is preferably made of soft rubber, which compressively embracesthe shaft l and fills its containing recess, and effectively seals thisregion against leakage.' As a further precaution I provide the sleeve 5with longitudinal ibs or knobs 7, shown to advantage in F igure 3, andengaging longitudinal channels or depressions 8, in the adjacent member.

These molded projections, function to pre-Y vent rotation of the sleevewith reference to that member.

9 and l0 represent metallic sleeve bearings, which are generallypositioned above and below the impellers and within close proximitythereof.

In the drawings, I have shown only one specific form of my invention,and it is to be understood that the invention may be embodied in otherforms, each being a species of my invention.

That I claim as new and desire to secure by Le'ters Patent of the UnitedStates, is the following:

In a deep well turbine pump, the combination in each set ot one innerand one outer casing with one impeller housed between, the inner casingof each set formed with a central bore and counter-bore and with aconcentric offset shoulder at the base of said inner casing, a shaft forthe bore and a sealing sleeve of rubber for the counterbore, and a plateadapted to seat in the said otiset shoulder and compress the sleevearound the shaft, and said plate having an opening through which theshaft extends.

In testimony whereof l aliix my signature.

JOHN n. KnArINe.

